Bearing defect detection using time synchronous averaging (TSA) of an enveloped accelerometer signal
US6681634B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Jan 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2698
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided of identifying a rotating bearing defect featuring the steps of measuring the vibration of the rotating bearing to obtain a waveform signal; filtering the waveform signal to remove unwanted signal frequencies; enveloping the filtered waveform signal to obtain an enveloped low frequency time waveform; and synchronizing the enveloped low frequency time waveform to the running speed of the rotating bearing in such a way to preserve the phase relationship between the tachometer pulse and bearing defect to obtain a time synchronized waveform. The method may include the step of measuring the rotational speed of the rotating bearing; and the step of measuring the rotational speed of the rotating bearing comprises measuring the rotational speed of the rotating bearing with a tachometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.